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Chapter 4
O P E R A T I O N T H E O R Y
4.1 Electrophotographics system, page 4-2
Electrophotographic system, page 4-2
OPC drum, page 4-2
Charging the drum, page 4-3
Toner, page 4-4
Exposure, page 4-4
Scanner unit, page 4-5
Scanning laser, page 4-7
Development, page 4-7
Developing roller bias, page 4-8
Toner sensor, page 4-9
Transfer, page 4-9
Fusing, page 4-10
Drum cleaning and erasing static charge, page 4-11
Typical photo process timing chart, page 4-12
4.2 Print timing charts, page 4-13
4.3 Paper feeding system, page 4-21
Cassette feeding, page 4-22
Multi purpose tray feeding, page 4-22
Paper jam sensing, page 4-23
4.4 Basic engine functions, page 4-24
Basic sequence of operation, page 4-24
4.5 Engine controller system, page 4-25
Flash memory, page 4-25
Print density control, page 4-25
High-voltage generator, page 4-25
Laser scanner control, page 4-25
Polygon motor control, page 4-25
Safety interlock, page 4-26
The engine gate array, page 4-27
Pin assignment, page 4-27
Power supply, page 4-31
4.6 Logic controller system, page 4-32
Printing data processing, page 4-34
System ROM, page 4-34
Main RAM, page 4-34
Memory card/hard disk(Microdrive) slot interface, page 4-35
Option interface, page 4-35
Parallel interface, page 4-36
Serial interface, page 4-37
Engine interface, page 4-37
Signals used for the engine interface, page 4-38
Содержание FS-6750
Страница 1: ...SERVICE MANUAL...
Страница 6: ...Conventions Preface vi This page left intentionally blank...
Страница 52: ...Maintenance Handling the developer unit 3 10 FS 6750 Insert the developer into the container as shown below...
Страница 120: ...Disassembly Disassembly Option paper feeder 5 24 FS 6750 This page left blank intentionally...
Страница 148: ...Troubleshooting Print quality problems 6 28 FS 6750 This page left blank intentionally...